/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Classes/MuCO/CustomizableObjectInstance.h
Adds/removes a texture channel coverage query to the instance update process. Every material updated by mutable with a channel named TextureName will be checked It only works properly when the Instance is in a state with texture compression disabled.
void AddQueryTextureCoverage ( const [FString](API\Runtime\Core\Containers\FString) & TextureName, const [FString](API\Runtime\Core\Containers\FString) * MaskOutChannelName )